Preparation of high specific surface area Cu(OH)2 nanowires/nanorods by coordinated precipitation
Shuang XU1,2, Jingkui QU1*, Guangye WEI1, Tao QI1
1. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
2. School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：Nano-copper hydroxide powder with different morphologies was synthesized by coordinated precipitation using CuSO4?5H2O, ammonia and NaOH as materials. The effects of amounts of NaOH and ammonia, and CuSO4 concentration on the morphology, particle size and specific surface area were investigated. The results showed that for different amounts of NaOH, when CuSO4 initial concentration was 0.1 mol/L, molar ratio of NH3:CuSO4=7 and molar ratio of NaOH:CuSO4=2~4, the prepared Cu (OH)2 was assembled into flower clusters by nanowires, and the numbers of flower-like structure of single head decreased and the double head flowers increased with amounts of NaOH increasing. For different amounts of ammonia, when CuSO4 initial concentration was 0.1 mol/L, molar ratio of NH3:NaOH=2 and molar ratio of NH3:CuSO4=7, the flower-like copper hydroxide of which the diameter was 0.3?1 μm and the length was 1?3 μm composed of nanowires the aspect ratio of which was 20?60 was obtained, and the Cu(OH)2 particles the surface on which had adsorbed water had uniform particle size distribution and the specific surface area of the powder was as large as 83.3 m2/g. For CuSO4 concentration, when molar ratio of NH3:CuSO4=3, and molar ratio of NaOH:CuSO4=2, the Cu(OH)2 nanowires tended to assemble into flower-like cluster structures with CuSO4 initial concentration decreasing.
徐爽 曲景奎 魏广叶 齐涛. 配位沉淀制备高比表面积氢氧化铜纳米线/纳米棒[J]. 过程工程学报, 2018, 18(5): 1052-1060.
Shuang XU Jingkui QU Guangye WEI Tao QI. Preparation of high specific surface area Cu(OH)2 nanowires/nanorods by coordinated precipitation. Chin. J. Process Eng., 2018, 18(5): 1052-1060.
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2018, Vol. 18 
